<template>
    <view>
        <!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> -->
        <my-search @click="gotoSearch"></my-search>
        
        <view class="scroll-view-container">
            <!-- 左侧 -->
            <scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh + 'px'}">
                <block v-for="(item, i) in cateList" :key="i">
                    <view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">
                        {{item.cat_name}}
                    </view>
                </block>
                <view class="left-scroll-view-item ">xxx</view>
            </scroll-view>
            <!-- 右侧 -->
            <scroll-view class="right-scroll-view" scroll-y="true" :style="{height:wh + 'px'}" :scroll-top="scrollTop">
                <!-- 二级分类 -->
                <view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
                    <view class="cate-lv2-title">
                        / {{ item2.cat_name }} /
                    </view>
                    <!-- 三级分类列表 -->
                    <view class="cate-lv3-list" >
                        <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
                            <image :src="item3.cat_icon"></image>
                            <text>{{item3.cat_name}}</text>
                        </view>
                    </view>
                </view>
            </scroll-view>
        </view>
    </view>
</template>

<script>
    import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
        mixins: [badgeMix],
        data() {
            return {
                wh: 0,
                cateList: [],
                active: 0,
                // 二级分类
                cateLevel2: [],
                scrollTop:0
            }
        },
        onLoad() {
            const sysInfo = uni.getSystemInfoSync()
            this.wh = sysInfo.windowHeight - 50

            this.getCateList()
        },
        methods: {
            async getCateList() {
                const {
                    data: res
                } = await uni.$http.get('/api/public/v1/categories')
                if (res.meta.status !== 200) return uni.$showMsg
                this.cateList = res.message

                this.cateLevel2 = res.message[0].children
            },
            activeChanged(i) {
                this.active = i

                this.cateLevel2 = this.cateList[i].children
                
                this.scrollTop = this.scrollTop === 0 ? 1 : 0
            },
            gotoGoodsList(item) {
                uni.navigateTo({
                    url:'/subpkg/goods_list/goods_list?cid='  + item.cat_id
                })
            },
            gotoSearch(){
                uni.navigateTo({
                    url:'/subpkg/search/search'
                })
            }
        }
    }
</script>

<style lang="scss">
    .scroll-view-container {
        display: flex;

        .left-scroll-view {
            width: 120px;

            .left-scroll-view-item {
                line-height: 60px;
                background-color: #f7f7f7;
                text-align: center;
                font-size: 12px;

                &.active {
                    background-color: #ffffff;
                    position: relative;

                    &::before {
                        content: ' ';
                        display: block;
                        width: 3px;
                        height: 30px;
                        background-color: #c00000;
                        position: absolute;
                        left: 0;
                        top: 50%;
                        transform: translateY(-50%);
                    }
                }
            }
        }
    }

    .cate-lv2-title {
        font-size: 12px;
        font-weight: bold;
        text-align: center;
        padding: 15px 0;


    }

    .cate-lv3-list {
        display: flex;
        flex-wrap: wrap;

        .cate-lv3-item {
            width: 33.33%;
            margin-bottom: 10px;
            display: flex;
            flex-direction: column;
            align-items: center;

            image {
                width: 60px;
                height: 60px;
            }

            text {
                font-size: 12px;
            }
        }
        }
</style>